... to contact an ex

[Beethoven]

I was in a short (six-months) relationship that was very intense for both of us. I prevaricated in the relationship because I didn't know what I wanted, and partly because I could foresee problems (that were largely due to circumstance). He told me that I was the perfect woman for him, and erotically, we seemed to be a perfect match.

Now, a few months on, I see him on Facebook, and can't help thinking that perhaps I was stupid to let him go, and I'm tempted to write a letter. However, I don't know whether he's seeing anyone, so it stir up a hornet's nest for him, and a potential unknown other.

Would I be unreasonable to contact him?

I don't think it would be unreasonable to perhaps send a short note/message asking how he is, what's he up to in his life etc.

You say only a few months on so it's not like its ten years down the line and you're both married. If you are single and you have nothing to lose an "enquiry" will do no harm for now :) and just take it from there.

Befriend him and take it from there :)

Contact him. Nothing ventured...